Mainline

Mainline, Main line, or Main Line may refer to:

Transportation

Main line (railway), the principal artery of a railway system
Main Line of Public Works, a railroad and canal system in Pennsylvania
- Main Line (Pennsylvania Railroad), rail line from Philadelphia to Pittsburgh that evolved from the above
- Philadelphia to Harrisburg Main Line, part of the Pennsylvania Railroad Main Line now owned by Amtrak
Main Line (Long Island Rail Road), Long Island City to Greenport
Main Line (NJ Transit), formerly part of the Erie Railroad, Hoboken to Suffern
Main Line (Sri Lanka), a railway line in Sri Lanka
SEPTA Main Line, shared segment to Glenside
South Line, Tasmania, Australia, also called the Main Line
Midland Mainline, a defunct UK train-operating company
Mainline Freight, a defunct UK railfreight company

Mainline (aeronautics), an airline carrier's non-regional service
A toll road system where all vehicles stop at various locations on the highway to pay a toll
First South Yorkshire, formerly "Mainline" (1993–1998), a large bus operator in South Yorkshire, England
Ford Mainline, a car model

Philadelphia Main Line, a collection of suburbs of Philadelphia
Mainline Protestant, a group of Christian church denominations
Trunk or mainline, the primary branch of a software project
BitTorrent (software), nicknamed mainline by developers denoting its official origins
Mainline, a model railway brand now owned by Bachmann.
"Mainlining," a slang term for intravenous (as opposed to subcutaneous/"skin popping") use of injectable drugs
Main line, primary variation in chess
Main line or Mainlinie, a historical and political boundary between Northern and Southern Germany roughly following the Main (river)